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how can 20 psi be a vacuum, if "20" would be 5-6 psi over atmospheric sea-level value?
it should show 20psi - 14.5psi = 5.5 more or less?
or maybe it is like 20 Hg of vacuum under atmospheric? don t own one so not used to them, but it makes sense since it would be around 0.35bar (5-6 psi)
Ecu gives 5-9 psi (depending on rpm) during idle because it is an absolute value of pressure, your boost gauge is a relative value
No it shouldn t show 1bar at 5000feet, but lower than 0,9.. honestly i m clueless at how US cars work about atmospheric pressure measurement though
Without direct access to the tune, only way to judge is to take a log (with ecutek cause we need more values as possible to be logged) while driving in the street
it is entirely possible the tune from edelbrock is not good for your car
Last edited by tomm.brz; 04-27-2020 at 05:34 PM.
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